Creator : Siemens company in the 1960'sDescription :Baud rate : 315 (one pixel is 3.175 ms long)Reading direction : column by column, from down to up and from left to right,Matrix : height: 9 pixels et width: 7 pixels…so a total of 63 pixels per character. For each character, 2 lines and 2 columns are reserved for the frame.Speed : 50 wpm (5 characters by second)Modulation : FSK two tones with a shift between tones of 300 Hz. Normally, the white is at 1625 Hz and the black at 1925 Hz.Receive mode : USBCharacter set : all ASCII printable characters except small letters, carriage return (+ line feed) and error reset character. The used font derived from the one used for FELD HELL,Shape of pulse : rectangularBandwidth : about 800 Hz (due to rectangular shape),Synchronization : no need, each column is displayed vertically 2 times (but transmitted once)Pmean/Ppeak : 1Lowest S/N : - 4 dBNote 1 : a start-stop mode also exists in the original systemNote 2 : it is added a "DX" and a "Super DX" sub-mods (provided also for FELD HELL and PSKHELL).

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Sound of Hell 80

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